Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization
Modified cokes with improved resistance to CO<sub>2</sub> reaction were produced from a high volatile coking coal (HVC) and different concentrations of boron carbide (B<sub>4</sub>C) in a laboratory scale coking furnace. This paper focuses on modification mechanism about the...
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2021-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/2/302 |
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| author | Qiang Wu Can Sun Zi-Zong Zhu Ying-Dong Wang Chong-Yuan Zhang |
| author_facet | Qiang Wu Can Sun Zi-Zong Zhu Ying-Dong Wang Chong-Yuan Zhang |
| author_sort | Qiang Wu |
| collection | DOAJ |
| description | Modified cokes with improved resistance to CO<sub>2</sub> reaction were produced from a high volatile coking coal (HVC) and different concentrations of boron carbide (B<sub>4</sub>C) in a laboratory scale coking furnace. This paper focuses on modification mechanism about the influence of B<sub>4</sub>C on coking behavior and chemical structure during HVC carbonization. The former was studied by using a thermo-gravimetric analyzer. For the latter, four semi-cokes prepared from carbonization tests for HVC with or without B<sub>4</sub>C at 450 °C and 750 °C, respectively, were analyzed by using Fourier transform infrared spectrum and high-resolution transmission electron microscopy technologies. It was found that B<sub>4</sub>C will retard extensive condensation and crosslinking reactions by reducing the amount of active oxygen obtained from thermally produced free radicals and increase secondary cracking reactions, resulting in increasing size of aromatic layer and anisotropic degree in coke structure, which eventually improves the coke quality. |
| first_indexed | 2024-03-09T05:34:56Z |
| format | Article |
| id | doaj.art-de0f13aac3fd4e3ba3a4c3c5c82b62d0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:34:56Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-de0f13aac3fd4e3ba3a4c3c5c82b62d02023-12-03T12:30:15ZengMDPI AGMaterials1996-19442021-01-0114230210.3390/ma14020302Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during CarbonizationQiang Wu0Can Sun1Zi-Zong Zhu2Ying-Dong Wang3Chong-Yuan Zhang4College of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaModified cokes with improved resistance to CO<sub>2</sub> reaction were produced from a high volatile coking coal (HVC) and different concentrations of boron carbide (B<sub>4</sub>C) in a laboratory scale coking furnace. This paper focuses on modification mechanism about the influence of B<sub>4</sub>C on coking behavior and chemical structure during HVC carbonization. The former was studied by using a thermo-gravimetric analyzer. For the latter, four semi-cokes prepared from carbonization tests for HVC with or without B<sub>4</sub>C at 450 °C and 750 °C, respectively, were analyzed by using Fourier transform infrared spectrum and high-resolution transmission electron microscopy technologies. It was found that B<sub>4</sub>C will retard extensive condensation and crosslinking reactions by reducing the amount of active oxygen obtained from thermally produced free radicals and increase secondary cracking reactions, resulting in increasing size of aromatic layer and anisotropic degree in coke structure, which eventually improves the coke quality.https://www.mdpi.com/1996-1944/14/2/302high volatile coking coalboron carbidecoking behaviorchemical structurecoke quality |
| spellingShingle | Qiang Wu Can Sun Zi-Zong Zhu Ying-Dong Wang Chong-Yuan Zhang Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization Materials high volatile coking coal boron carbide coking behavior chemical structure coke quality |
| title | Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization |
| title_full | Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization |
| title_fullStr | Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization |
| title_full_unstemmed | Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization |
| title_short | Effects of Boron Carbide on Coking Behavior and Chemical Structure of High Volatile Coking Coal during Carbonization |
| title_sort | effects of boron carbide on coking behavior and chemical structure of high volatile coking coal during carbonization |
| topic | high volatile coking coal boron carbide coking behavior chemical structure coke quality |
| url | https://www.mdpi.com/1996-1944/14/2/302 |
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